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Wyszukujesz frazę "pro-antioxidant" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Initial pro-antioxidant reactions in the patients suffering from cataract in the interactions with cadmium and lead
Autorzy:
Kempka, Katarzyna
Kamiński, Piotr
Malukiewicz, Grażyna
Bogdzińska, Maria
Florczak, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/1164124.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
cadmium
cataract
environmental pollution
lead
pro-antioxidant
Opis:
Cataract is one of the main causes of vision loss. So far, it has been found that one of the causes of cataract formation is the accumulation of heavy metals in ocular tissues and environmental pollution. Research material consisted of blood from healthy volunteers (n = 81; Mogilno Lakeland) and those suffering from cataract (n = 90) from Ophthalmology Clinic, Bydgoszcz (2013, 2016). Samples were prepared in order to obtain plasma, which was used to analyze Fe, Cu, Zn, Mn, Pb, Cd, and Hg concentration (ICP-MS). The purpose of this study is to show the interaction of cataract with cadmium and lead during initial pro-antioxidative reactions and to study element-element interactions. To this end, we analyzed physiological mechanisms that aim to stop the destructive effects of toxic metals. We have shown that the action of zinc, copper and manganese is antioxidant. Concentration of these elements is higher (α = 0. 05, p < 0.05) in the cataract group than in the control. We found interactions Fe-Cu-Zn-Mn-Pb-Cd-Hg. Cd and Pb show a negative effect on the eye tissue and generate pathophysiological changes leading to lens opacity and influence the destabilization of pro-antioxidant reactions. Correlations of elements in the control (Cd-Zn: R = 0.240; Cd-Cu: R = 0.316) and in the sick group (Cd-Cu; R = 0.329) were significant. On the basis of our research we found that there are numerous relationships between the concentrations of chemical elements in the patients with cataracts and the controls. Significant role of antagonisms with cadmium and lead has been demonstrated; these elements contribute to the gradual development of cataract. A correlation between elements exhibiting pro-antioxidant activity in the interactions with cadmium and lead (p=0.000) can be a source of cataract changes. The differences in Cd and Pb concentration and their interactions with elements between the control and sick groups can be considered as a factor for the development of cataract.
Źródło:
World Scientific News; 2018, 108; 195-206
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of DNA damage profile and oxidative /antioxidative biomarker level in patients with inflammatory bowel disease
Autorzy:
Mrowicka, Małgorzata
Mrowicki, Jerzy
Mik, Michał
Dziki, Łukasz
Dziki, Adam
Majsterek, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/1391884.pdf
Data publikacji:
2020
Wydawca:
Index Copernicus International
Tematy:
DNA oxidative damage repair
inflammatory bowel diseases
pro/antioxidant status
Opis:
Aim: The purpose of this study was to investigate the oxidative DNA damage, pro-antioxidant status in Polish patients with inflammatory bowel disease (IBD). Methods: Oxidative DNA damage was measured by comet assay techniques; nitric oxide (NO) and plasmatic lipid peroxidation (MDA) as oxidative stress were valuated by colometric methods; superoxide dismutase (SOD1), catalase (CAT) and glutathione peroxidase (GPx1) as antioxidative defense were determined by spectrophotometric methods. Results: The level of oxidative DNA damage in IBD patients was significantly higher in relation to controls (P = 0.01). Alike, in control subject as well as in patients with IBD, lymphocytes are characterized by complete repair of DNA damage. A significant decrease of SOD (P = 0.031), CAT (P = 0.006), GPx1 (P = 0.001) activity was seen in IBD patients vs control. MDA (P = 0.001) and NO (P = 0.001) concentrations were significantly increased in IBD patients as compared to healthy subjects. Conclusions: Our results may be due to the induction of DNA repair genes which may occur at the stage of the pathological changes (IBD) that may be caused by excessive oxidative stress. However, the cause of this relationship, and whether it is direct or indirect, remains to be explored.
Źródło:
Polish Journal of Surgery; 2020, 92, 5; 8-14
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double-edged sword behaviour of gallic acid and its interaction with peroxidases in human microvascular endothelial cell culture (HMEC-1). Antioxidant and pro-oxidant effects
Autorzy:
Serrano, José
Cipak, Ana
Boada, Jordi
Gonzalo, Hugo
Cacabelos, Daniel
Cassanye, Anna
Pamplona, Reinald
Zarkovic, Neven
Portero-Otin, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1040403.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
gallic acid
peroxidase
pro-oxidant
antioxidant
HMEC-1
Opis:
A previous report from our group had shown in vitro a direct interaction between peroxidases and dietary antioxidants at physiological concentrations, where in the absence of H2O2, the antioxidants could serve as oxidizing substrates for the peroxidases. However, the physiological relevance of those findings had not been evaluated. The main objective of this study was to determine whether the oxidizing products produced in the interaction between peroxidase and gallic acid at a physiological concentration of 1 µM may promote cell death or survival in a human microvascular endothelial cell line (HMEC-1). Our findings suggested that gallic acid may show a double-edged sword behaviour, since in the absence of H2O2 it may have a pro-oxidant effect which may promote cell injury (evidenced by LDH, Crystal Violet and calcein AM viability/citotoxicity assays), while in the presence of H2O2, gallic acid may act as an antioxidant inhibiting oxidative species produced in the peroxidase cycle of peroxidases. These observations were confirmed with several oxidative stress biomarkers and the evaluation of the activation of cell survival pathways like AKT and MAPK/ERK.
Źródło:
Acta Biochimica Polonica; 2010, 57, 2; 193-198
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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